Can't turn off x-ray?
you need to deactivate the X-RAY box in each object, I do not know exactly what could be the cause of this because you did not put a reference image and the information is very poor although it basically describes the problem







change this and correct another part of what is still seen with transparency, you have many errors not related to the question, it is no longer a question of only one answer, it has become a cluster of answers not directly related

to the animals, uncheck the box backface culling, in the tab Color / Game Settings / backface culling, in the Object / Display / Maximum Draw Type tab, all objects need are in SOLID